Hi Gayatri,
I tried to reproduce the issue locally indhtmlxScheduler v5.2.0 and dhtmlxScheduler v5.0.0, since I’m not sure what version you mean, but it seems to work properly. Here is standalone HTML page in which I tried to reproduce the issue: 03_tree.html (4.7 KB)
According to this note:
On the UI, we click on node X only but the “onYScaleclick” event is processing the details of section ‘Y’.
In order for me to understand where the issue is, please send me an example of your code. You can add the information to the HTML page above and send it back.
P.S. Probably, updating to the latest version of the Scheduler could solve your problem.